package com.atguigu.flink.chapter11;

import com.atguigu.flink.bean.WaterSensor;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.table.api.Table;
import org.apache.flink.table.api.bridge.java.StreamTableEnvironment;

import static org.apache.flink.table.api.Expressions.$;

/**
 * @Author lizhenchao@atguigu.cn
 * @Date 2022/1/22 10:35
 */
public class Flink02_Table_BaseUse_Agg {
    public static void main(String[] args) {
        Configuration conf = new Configuration();
        conf.setInteger("rest.port", 20000);
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(conf);
        env.setParallelism(1);
    
        DataStreamSource<WaterSensor> waterSensorStream =
            env.fromElements(new WaterSensor("sensor_1", 1000L, 10),
                             new WaterSensor("sensor_1", 2000L, 20),
                             new WaterSensor("sensor_2", 3000L, 30),
                             new WaterSensor("sensor_1", 4000L, 40),
                             new WaterSensor("sensor_1", 5000L, 50),
                             new WaterSensor("sensor_2", 6000L, 60));
        
        // 1. 表的执行环境
        StreamTableEnvironment tEnv = StreamTableEnvironment.create(env);
     
        Table table = tEnv.fromDataStream(waterSensorStream);
        
        // select id, sum(vc) as vc_sum from t group by id
    
        /*Table result = table
            .groupBy($("id"))
            .aggregate($("vc").sum().as("vc_sum"))
            .select($("id"), $("vc_sum"));*/
        Table result = table
            .groupBy($("id"))
            .select($("id"), $("vc").sum().as("vc_sum"));
    
        //        DataStream<Tuple2<Boolean, Row>> stream = tEnv.toRetractStream(result, Row.class);
//        stream.print();
    
        result.execute().print();
        
       /* try {
            env.execute();
        } catch (Exception e) {
            e.printStackTrace();
        }*/
    }
}
